Vulnerability-Lookup

FKIE_CVE-2026-43453

Vulnerability from fkie_nvd - Published: 2026-05-08 15:16 - Updated: 2026-05-21 16:52

Severity

7.1 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: netfilter: nft_set_pipapo: fix stack out-of-bounds read in pipapo_drop() pipapo_drop() passes rulemap[i + 1].n to pipapo_unmap() as the to_offset argument on every iteration, including the last one where i == m->field_count - 1. This reads one element past the end of the stack-allocated rulemap array (declared as rulemap[NFT_PIPAPO_MAX_FIELDS] with NFT_PIPAPO_MAX_FIELDS == 16). Although pipapo_unmap() returns early when is_last is true without using the to_offset value, the argument is evaluated at the call site before the function body executes, making this a genuine out-of-bounds stack read confirmed by KASAN: BUG: KASAN: stack-out-of-bounds in pipapo_drop+0x50c/0x57c [nf_tables] Read of size 4 at addr ffff8000810e71a4 This frame has 1 object: [32, 160) 'rulemap' The buggy address is at offset 164 -- exactly 4 bytes past the end of the rulemap array. Pass 0 instead of rulemap[i + 1].n on the last iteration to avoid the out-of-bounds read.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/0a55d62cdb628923d8a21724374a70c76ac7d19d	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/1957e793196e7f8557374fd4eda53abcbb42e1c0	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/324b749aa5b2d516ccfab933df9d3f56e7807f5f	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/57fb87ca095d5127cd7a27583b8ec43dcf7c9e9e	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/60c1d18781e37bfb96290b86510eb01c5fa24d75	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d6d8cd2db236a9dd13dbc2d05843b3445cc964b5	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/dfbdac719198778b581bc0dd055df2542edb8c62	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/e047f6fbb975f685d6c9fcef95b3b7787a79b46d	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0

JSON

To clipboard

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CVE-2026-43453 (GCVE-0-2026-43453)

Vulnerability from cvelistv5 – Published: 2026-05-08 14:22 – Updated: 2026-05-11 22:24

Title

netfilter: nft_set_pipapo: fix stack out-of-bounds read in pipapo_drop()

Summary

Severity

No CVSS data available.

Assigner

Linux

References

8 references

URL	Tags
https://git.kernel.org/stable/c/1957e793196e7f855…
https://git.kernel.org/stable/c/57fb87ca095d5127c…
https://git.kernel.org/stable/c/60c1d18781e37bfb9…
https://git.kernel.org/stable/c/0a55d62cdb628923d…
https://git.kernel.org/stable/c/dfbdac719198778b5…
https://git.kernel.org/stable/c/e047f6fbb975f685d…
https://git.kernel.org/stable/c/324b749aa5b2d516c…
https://git.kernel.org/stable/c/d6d8cd2db236a9dd1…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 3c4287f62044a90e73a561aa05fc46e62da173da , < 1957e793196e7f8557374fd4eda53abcbb42e1c0 (git) Affected: 3c4287f62044a90e73a561aa05fc46e62da173da , < 57fb87ca095d5127cd7a27583b8ec43dcf7c9e9e (git) Affected: 3c4287f62044a90e73a561aa05fc46e62da173da , < 60c1d18781e37bfb96290b86510eb01c5fa24d75 (git) Affected: 3c4287f62044a90e73a561aa05fc46e62da173da , < 0a55d62cdb628923d8a21724374a70c76ac7d19d (git) Affected: 3c4287f62044a90e73a561aa05fc46e62da173da , < dfbdac719198778b581bc0dd055df2542edb8c62 (git) Affected: 3c4287f62044a90e73a561aa05fc46e62da173da , < e047f6fbb975f685d6c9fcef95b3b7787a79b46d (git) Affected: 3c4287f62044a90e73a561aa05fc46e62da173da , < 324b749aa5b2d516ccfab933df9d3f56e7807f5f (git) Affected: 3c4287f62044a90e73a561aa05fc46e62da173da , < d6d8cd2db236a9dd13dbc2d05843b3445cc964b5 (git)
Linux	Linux	Affected: 5.6 Unaffected: 0 , < 5.6 (semver) Unaffected: 5.10.253 , ≤ 5.10.* (semver) Unaffected: 5.15.203 , ≤ 5.15.* (semver) Unaffected: 6.1.167 , ≤ 6.1.* (semver) Unaffected: 6.6.130 , ≤ 6.6.* (semver) Unaffected: 6.12.78 , ≤ 6.12.* (semver) Unaffected: 6.18.19 , ≤ 6.18.* (semver) Unaffected: 6.19.9 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

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            "net/netfilter/nft_set_pipapo.c"
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nft_set_pipapo: fix stack out-of-bounds read in pipapo_drop()\n\npipapo_drop() passes rulemap[i + 1].n to pipapo_unmap() as the\nto_offset argument on every iteration, including the last one where\ni == m-\u003efield_count - 1. This reads one element past the end of the\nstack-allocated rulemap array (declared as rulemap[NFT_PIPAPO_MAX_FIELDS]\nwith NFT_PIPAPO_MAX_FIELDS == 16).\n\nAlthough pipapo_unmap() returns early when is_last is true without\nusing the to_offset value, the argument is evaluated at the call site\nbefore the function body executes, making this a genuine out-of-bounds\nstack read confirmed by KASAN:\n\n  BUG: KASAN: stack-out-of-bounds in pipapo_drop+0x50c/0x57c [nf_tables]\n  Read of size 4 at addr ffff8000810e71a4\n\n  This frame has 1 object:\n   [32, 160) \u0027rulemap\u0027\n\n  The buggy address is at offset 164 -- exactly 4 bytes past the end\n  of the rulemap array.\n\nPass 0 instead of rulemap[i + 1].n on the last iteration to avoid\nthe out-of-bounds read."
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    "datePublished": "2026-05-08T14:22:18.087Z",
    "dateReserved": "2026-05-01T14:12:56.010Z",
    "dateUpdated": "2026-05-11T22:24:52.944Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

FKIE_CVE-2026-43453

CVE-2026-43453 (GCVE-0-2026-43453)

Tags

Sightings

Nomenclature